Tips for restoring teak include cleaning the wood, restoring the color of the wood and protecting and preserving the restored wood. Use a mixture of one part bleach to one part water and a soft brush to clean away dirt, then rinse the chair with pure water, suggests DoItYourself.com.
Teak wood can develop a gray finish over time, especially in outdoor furniture. Commercial teak cleaners can help with more difficult stains and remove the gray coloration. Physical abrasion through light sanding or power washing can also remove the gray finish. Though power washing is the quickest method, it strips the furniture of natural oils.
Rub teak oil on the restored furniture to enhance the color and give it a lustrous sheen. This effect fades after three to six months. Teak sealant further protects the appearance of the furniture from weathering.
Using a waterproof cover can protect teak furniture from sun and rain to preserve the restored wood. Extreme high and low temperatures can damage the wood by causing it to expand and contract, causing cracks to form in the wood. Consider bringing the furniture indoors during hot and cold extremes and when not planning to use the furniture for an extended period of time.